1. Korean Water Resources Corp.; Taejon South Korea
2. Center for Agric. and Rural Dev., Dep. of Economics; Iowa State Univ.; Ames IA 50011
3. USDA-ARS, 233 Johnson Hall; Washington State Univ.; Pullman WA 99164
4. Univ. of Minnesota; Southern Research and Outreach Station; Waseca MN 56093